Extensometer



Paesane. 1e, 1924.

UNITED STAT-11s` PATENT ossics.

nm c. summum um ma wnanraxs, or mon, onto,A sssronons ro 'nm mn m im GILIY, F moli, Omo, A @EPURATION 0I' OHIO.

puns sus :inw-y s1, ma. sum1. scosse,

To allaoo'm it may vmwem: BeitknownthatwgEsu: C. and Ina Wx'xmsn's, citizens of the United States, residing at Akron, in the county of `I Summit, State of Ohio, have invented certainpew and useful Improvements in Extensometers, of which the following is a specification.

This invention relates to an extensometer, or device for m compreibility ofl certain substances which "hfpmw' 'lt m' "m ing pa y ormeasuring e compreibility of ru ber or the' like'. The of the invention is to improve u n prior-devices for use in rkproviiig a device which will give accurate onY all sorts of rubber compounds and be adjustable for a large variety of stocks 3 so as to give a wide to the instrument.

A further object is to and construct an instrumento! this type compact and simple and will not-easily get `outoforder.

.other objects `are attained by the improved'insrummt shown and described herein, it beinxunderstood thatchanges maybemade in, e form andarrangement of the :parts without departing .from the 2 invention or any of, 1in beneiiie.

form of extensometer or tester.

Fig. is a lo'ngitudnllalN- fsectla'x'on. isa` 'nt-visive eamp face or dialremoved. The device a centrally located casingorbox1,w 'chcontainstheam hiy- `ingmeehanismtobedescribed and a 2 covered by -a las! 3. From one side of the A exten a short tube jin the lower end-of which is-screw-threaded a foot or the hardness or' whichv vill be Fig. 1 -is a fron elevation of the improved small hand or pointer 13 which travels over a graduated 14 inscribed on the face of the diei. The snat ii'ixso carries a larger gear 15, which meshes 'with s small pinion 16 on a'shaft 17 mounted in the plate 12 and the dial. The end of the shaft 17 carries a largenhand or pointer 18 which travels over a series of graduatons 19 around the circumference -of the dial.'

The relative speed ,of rotation of the hands 1,3 and 18- bears a definite relation to the graduation on the dials 14 .and l9`so that a graduation on the former represents a revoution .or a half revolution of the hand 18. In this wa the total movement of therod 'I and the ythe penetration'of the pin 8 may bereadlly ascertained. An idler gear 20 meshes with the pinion 16 being supported on a shaft 21 similarly Amount-ed on the plate 1 2 and dial 2, and on. the shaft 21 is arra which serves to taxe up any looseness the which has been 'The plate is weighted atits outer end as shown in Fi 3 to keep the pinion 1 0 in mesh with the rica Ahght coil spr 2 msi beplaced around therod'fbeing ldbe around a barrel 22 nged a light coil spring tween the upper side of the casing and a pin '.lne rod 7 extends above the top of the c and the lower' end of anelom tube 25 which fits over a projection on the outer side of the end ofthe rod 7 is provided with a 2 whhtiw s a afig e'o Aspr-.11g up r en o w is confined the tube.25. n

The pin or stop 29 islieldv down by a screw which isthreadd in the top of thetube 2l.,the screw beingsecuredinaplugl in the -outer end of-a or sleeve 82 which surroundsthenplperen ofthetube25. A seriesofthread holesareformcdinthe side of thetnbe 25 .and a`scrcw ed PinMisreceivedinthelowe'rendofthe tension ofthe spring 28 to enable the instru casing-The' by a headed pm 29 near the top of mentwbemdosmhvingwidemi tions in compressibility, the pm 84 iennscrewed from the hole 33 whxehitoeoupies and the sleeve adjusted up or down until the pin is in register wi` another hole whereupon iti inserted and locks the sciew in ad'u'sted position. In this way the a pin on the end of the rod adapted to rocapacity o the t is increased, ject lbiiond the plane of the base, a ra on compensation beingBmade-in calculating 'the the a train of gearing engaging said compressibility of e stock according te the indicating devices o ated 'by said 00 position ofthe sleeve 32. a spring to rem t e in outward# In using the instrument, the foot is Eef e base, and a justing iiiechanism to placed on the surface'ofthe steckte be varythepressureofthe ring. tested as shown in-Fig. 1. The amount of 5; In a device of the c raeter set forth, depredon of the stock caused by the m a. casing, motion amplifying and indicatiig la28isbythepositionofthe A meehanismwitliinthecasing,arodexten 13and 18. 'ingthxoughtliecasingandconnectedtosaid -Itwill be seenthag'bg the use of the demechanisima foot piece, a irren one endof vieeshown herein a uic and-accurate read said rod projecting beyon the plane of the ing may be'obta' which will -give a defifoot piece, a'spring bearing upon the `ther 60 il nite .t of the eoi'iligresaibility of end of the rod, and adj the stock which is tested. e instrumentregulate'the pressure of sai ring. canbehandled without danger of injuring In a device of the character set forth,

in to it and'a wide range of adjts'i's a a rin constituting' an am lifymg fcxaa.- mi inig g P l0 Claims:- ing,arodext'end' throughsaidcasing,and L Inadevice of theeharacter descrihed,a connected withsai gea ,a inonpneend foot piecenarodslcllaily moinrtdinthe foot itilfsaidrod, a base beyond eblane of whgh iece,a mcarri sai Vroecting spin ro}ects,as 'ringon e. yo'nd e lane of the foot p iecre, ilin ai'nf otheren of said rod,pa tub 'thefpin and means to exert a yielding e'd within thou per end of th casing gli an indicating mechamsm operated said ipring attached to the c a screw y thx'ea iilponthe and bearing upon e u per end of the 2. In a. evice of e character described, a springend means to hold e screw in vary-A bass, a in slidably mounted in the base and positions of adjustment. ada toproect beyondthc plane thereof, A device of the character described amp an indicating mechanism concomprising a. ca .s having an abutment to nected wi Athe pin and operable thereby, a .engage the mate'ri to be tested, a indle ring device to force the pin outwardly of mounted to move inward] with re rence e'base and means to 'adjust the p of to said casingwhen, p y the material, 8 the ring. said spindle having. anlend to 1;" the 8. a device ofthe character set forth, material, a spring tending to resiste ina base, a red'slidably mounted in the ward movement,` o'f the spindle, 'the size of araekonsaidrod,apinonthendofsai said end and the resistance of said spring eating mechanism within said cas- 05 ular housing for rod adapted to project beyond the plane of haviiligall a predetermined relation when the mate 'l'4 thebase',a trainof withthe said abutment, means to rack, indicating :m operatedliy said adinet the compression of said spring, andV and yiel means acting'to rees means operatively connected with said. pin outwardly yoiid the plane o the spindle to indicate the hardness of the base. material.

iinidevi'ofzhehmwmfmh, ERLEC.. abaee,arodslidablymountedinthebase, IRAWILLIAMS. 

